diff options
Diffstat (limited to 'src/include/utils/memutils_internal.h')
| -rw-r--r-- | src/include/utils/memutils_internal.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/src/include/utils/memutils_internal.h b/src/include/utils/memutils_internal.h index bc2cbdd5061..452b5002707 100644 --- a/src/include/utils/memutils_internal.h +++ b/src/include/utils/memutils_internal.h @@ -71,6 +71,24 @@ extern void SlabCheck(MemoryContext context); #endif /* + * These functions support the implementation of palloc_aligned() and are not + * part of a fully-fledged MemoryContext type. + */ +extern void AlignedAllocFree(void *pointer); +extern void *AlignedAllocRealloc(void *pointer, Size size); +extern MemoryContext AlignedAllocGetChunkContext(void *pointer); +extern Size AlignedAllocGetChunkSpace(void *pointer); + +/* + * How many extra bytes do we need to request in order to ensure that we can + * align a pointer to 'alignto'. Since palloc'd pointers are already aligned + * to MAXIMUM_ALIGNOF we can subtract that amount. We also need to make sure + * there is enough space for the redirection MemoryChunk. + */ +#define PallocAlignedExtraBytes(alignto) \ + ((alignto) + (sizeof(MemoryChunk) - MAXIMUM_ALIGNOF)) + +/* * MemoryContextMethodID * A unique identifier for each MemoryContext implementation which * indicates the index into the mcxt_methods[] array. See mcxt.c. @@ -92,8 +110,8 @@ typedef enum MemoryContextMethodID MCTX_ASET_ID, MCTX_GENERATION_ID, MCTX_SLAB_ID, - MCTX_UNUSED4_ID, /* available */ - MCTX_UNUSED5_ID /* 111 occurs in wipe_mem'd memory */ + MCTX_ALIGNED_REDIRECT_ID, + MCTX_UNUSED4_ID /* 111 occurs in wipe_mem'd memory */ } MemoryContextMethodID; /* |